Merge pull request #71 from heyongjian/ios-style

Ios style
fix bug:JOYL-95,can not re-download the built-in software when re-networking
fix bug:JOYL-96,continue to download when update the built-in virtual Shoutcut list
Merge pull request #234 from lwanghaol/ios-style

 fix bug:JOYL-96,continue to download when update the built-in virtual Shoutcut list